main.c revision 1.22
1 /* $NetBSD: main.c,v 1.22 1999/03/14 18:30:04 kristerw Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1988, 1993 5 * Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\n\ 39 Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 3/1/94"; 45 #else 46 __RCSID("$NetBSD: main.c,v 1.22 1999/03/14 18:30:04 kristerw Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/file.h> 52 #include <sys/protosw.h> 53 #include <sys/socket.h> 54 55 #include <netinet/in.h> 56 57 #include <ctype.h> 58 #include <err.h> 59 #include <errno.h> 60 #include <kvm.h> 61 #include <limits.h> 62 #include <netdb.h> 63 #include <nlist.h> 64 #include <paths.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <unistd.h> 69 #include "netstat.h" 70 71 struct nlist nl[] = { 72 #define N_MBSTAT 0 73 { "_mbstat" }, 74 #define N_IPSTAT 1 75 { "_ipstat" }, 76 #define N_TCBTABLE 2 77 { "_tcbtable" }, 78 #define N_TCPSTAT 3 79 { "_tcpstat" }, 80 #define N_UDBTABLE 4 81 { "_udbtable" }, 82 #define N_UDPSTAT 5 83 { "_udpstat" }, 84 #define N_IFNET 6 85 { "_ifnet" }, 86 #define N_IMP 7 87 { "_imp_softc" }, 88 #define N_ICMPSTAT 8 89 { "_icmpstat" }, 90 #define N_RTSTAT 9 91 { "_rtstat" }, 92 #define N_UNIXSW 10 93 { "_unixsw" }, 94 #define N_IDP 11 95 { "_nspcb"}, 96 #define N_IDPSTAT 12 97 { "_idpstat"}, 98 #define N_SPPSTAT 13 99 { "_spp_istat"}, 100 #define N_NSERR 14 101 { "_ns_errstat"}, 102 #define N_CLNPSTAT 15 103 { "_clnp_stat"}, 104 #define IN_NOTUSED 16 105 { "_tp_inpcb" }, 106 #define ISO_TP 17 107 { "_tp_refinfo" }, 108 #define N_TPSTAT 18 109 { "_tp_stat" }, 110 #define N_ESISSTAT 19 111 { "_esis_stat"}, 112 #define N_NIMP 20 113 { "_nimp"}, 114 #define N_RTREE 21 115 { "_rt_tables"}, 116 #define N_CLTP 22 117 { "_cltb"}, 118 #define N_CLTPSTAT 23 119 { "_cltpstat"}, 120 #define N_NFILE 24 121 { "_nfile" }, 122 #define N_FILE 25 123 { "_file" }, 124 #define N_IGMPSTAT 26 125 { "_igmpstat" }, 126 #define N_MRTPROTO 27 127 { "_ip_mrtproto" }, 128 #define N_MRTSTAT 28 129 { "_mrtstat" }, 130 #define N_MFCHASHTBL 29 131 { "_mfchashtbl" }, 132 #define N_MFCHASH 30 133 { "_mfchash" }, 134 #define N_VIFTABLE 31 135 { "_viftable" }, 136 #define N_MSIZE 32 137 { "_msize" }, 138 #define N_MCLBYTES 33 139 { "_mclbytes" }, 140 #define N_DDPSTAT 34 141 { "_ddpstat"}, 142 #define N_DDPCB 35 143 { "_ddpcb"}, 144 #define N_MBPOOL 36 145 { "_mbpool" }, 146 #define N_MCLPOOL 37 147 { "_mclpool" }, 148 { "" }, 149 }; 150 151 struct protox { 152 u_char pr_index; /* index into nlist of cb head */ 153 u_char pr_sindex; /* index into nlist of stat block */ 154 u_char pr_wanted; /* 1 if wanted, 0 otherwise */ 155 void (*pr_cblocks) /* control blocks printing routine */ 156 __P((u_long, char *)); 157 void (*pr_stats) /* statistics printing routine */ 158 __P((u_long, char *)); 159 void (*pr_dump) /* PCB state dump routine */ 160 __P((u_long)); 161 char *pr_name; /* well-known name */ 162 } protox[] = { 163 { N_TCBTABLE, N_TCPSTAT, 1, protopr, 164 tcp_stats, tcp_dump, "tcp" }, 165 { N_UDBTABLE, N_UDPSTAT, 1, protopr, 166 udp_stats, 0, "udp" }, 167 { -1, N_IPSTAT, 1, 0, 168 ip_stats, 0, "ip" }, 169 { -1, N_ICMPSTAT, 1, 0, 170 icmp_stats, 0, "icmp" }, 171 { -1, N_IGMPSTAT, 1, 0, 172 igmp_stats, 0, "igmp" }, 173 { -1, -1, 0, 0, 174 0, 0, 0 } 175 }; 176 177 #ifndef SMALL 178 struct protox atalkprotox[] = { 179 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr, 180 ddp_stats, 0, "ddp" }, 181 { -1, -1, 0, 0, 182 0, 0 } 183 }; 184 185 struct protox nsprotox[] = { 186 { N_IDP, N_IDPSTAT, 1, nsprotopr, 187 idp_stats, 0, "idp" }, 188 { N_IDP, N_SPPSTAT, 1, nsprotopr, 189 spp_stats, 0, "spp" }, 190 { -1, N_NSERR, 1, 0, 191 nserr_stats, 0, "ns_err" }, 192 { -1, -1, 0, 0, 193 0, 0 } 194 }; 195 196 struct protox isoprotox[] = { 197 { ISO_TP, N_TPSTAT, 1, iso_protopr, 198 tp_stats, 0, "tp" }, 199 { N_CLTP, N_CLTPSTAT, 1, iso_protopr, 200 cltp_stats, 0, "cltp" }, 201 { -1, N_CLNPSTAT, 1, 0, 202 clnp_stats, 0, "clnp"}, 203 { -1, N_ESISSTAT, 1, 0, 204 esis_stats, 0, "esis"}, 205 { -1, -1, 0, 0, 206 0, 0, 0 } 207 }; 208 #endif 209 210 struct protox *protoprotox[] = { protox, 211 #ifndef SMALL 212 atalkprotox, nsprotox, isoprotox, 213 #endif 214 NULL }; 215 216 int main __P((int, char *[])); 217 static void printproto __P((struct protox *, char *)); 218 static void usage __P((void)); 219 static struct protox *name2protox __P((char *)); 220 static struct protox *knownname __P((char *)); 221 222 kvm_t *kvmd; 223 224 int 225 main(argc, argv) 226 int argc; 227 char *argv[]; 228 { 229 extern char *optarg; 230 extern int optind; 231 struct protoent *p; 232 struct protox *tp; /* for printing cblocks & stats */ 233 int ch; 234 char *nlistf = NULL, *memf = NULL; 235 char buf[_POSIX2_LINE_MAX], *cp; 236 u_long pcbaddr; 237 gid_t egid = getegid(); 238 239 (void)setegid(getgid()); 240 tp = NULL; 241 af = AF_UNSPEC; 242 pcbaddr = 0; 243 244 while ((ch = getopt(argc, argv, "Aabdf:ghI:iM:mN:nP:p:rstuvw:")) != -1) 245 switch(ch) { 246 case 'A': 247 Aflag = 1; 248 break; 249 case 'a': 250 aflag = 1; 251 break; 252 case 'b': 253 bflag = 1; 254 break; 255 case 'd': 256 dflag = 1; 257 break; 258 case 'f': 259 if (strcmp(optarg, "ns") == 0) 260 af = AF_NS; 261 else if (strcmp(optarg, "inet") == 0) 262 af = AF_INET; 263 else if (strcmp(optarg, "unix") == 0 264 || strcmp(optarg, "local") == 0) 265 af = AF_LOCAL; 266 else if (strcmp(optarg, "iso") == 0) 267 af = AF_ISO; 268 else if (strcmp(optarg, "atalk") == 0) 269 af = AF_APPLETALK; 270 else 271 errx(1, "%s: unknown address family", 272 optarg); 273 break; 274 #ifndef SMALL 275 case 'g': 276 gflag = 1; 277 break; 278 #endif 279 case 'I': 280 iflag = 1; 281 interface = optarg; 282 break; 283 case 'i': 284 iflag = 1; 285 break; 286 case 'M': 287 memf = optarg; 288 break; 289 case 'm': 290 mflag = 1; 291 break; 292 case 'N': 293 nlistf = optarg; 294 break; 295 case 'n': 296 nflag = 1; 297 break; 298 case 'P': 299 pcbaddr = strtoul(optarg, &cp, 16); 300 if (*cp != '\0' || errno == ERANGE) 301 errx(1, "invalid PCB address %s", 302 optarg); 303 Pflag = 1; 304 break; 305 case 'p': 306 if ((tp = name2protox(optarg)) == NULL) 307 errx(1, "%s: unknown or uninstrumented protocol", 308 optarg); 309 pflag = 1; 310 break; 311 case 'r': 312 rflag = 1; 313 break; 314 case 's': 315 ++sflag; 316 break; 317 case 't': 318 tflag = 1; 319 break; 320 case 'u': 321 af = AF_LOCAL; 322 break; 323 case 'v': 324 vflag = 1; 325 break; 326 case 'w': 327 interval = atoi(optarg); 328 iflag = 1; 329 break; 330 case '?': 331 default: 332 usage(); 333 } 334 argv += optind; 335 argc -= optind; 336 337 #define BACKWARD_COMPATIBILITY 338 #ifdef BACKWARD_COMPATIBILITY 339 if (*argv) { 340 if (isdigit(**argv)) { 341 interval = atoi(*argv); 342 if (interval <= 0) 343 usage(); 344 ++argv; 345 iflag = 1; 346 } 347 if (*argv) { 348 nlistf = *argv; 349 if (*++argv) 350 memf = *argv; 351 } 352 } 353 #endif 354 355 /* 356 * Discard setgid privileges. If not the running kernel, we toss 357 * them away totally so that bad guys can't print interesting stuff 358 * from kernel memory, otherwise switch back to kmem for the 359 * duration of the kvm_openfiles() call. 360 */ 361 if (nlistf != NULL || memf != NULL || Pflag) 362 (void)setgid(getgid()); 363 else 364 (void)setegid(egid); 365 366 if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, 367 buf)) == NULL) 368 errx(1, "%s", buf); 369 370 /* do this now anyway */ 371 if (nlistf == NULL && memf == NULL) 372 (void)setgid(getgid()); 373 374 if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) { 375 if (nlistf) 376 errx(1, "%s: no namelist", nlistf); 377 else 378 errx(1, "no namelist"); 379 } 380 if (mflag) { 381 mbpr(nl[N_MBSTAT].n_value, nl[N_MSIZE].n_value, 382 nl[N_MCLBYTES].n_value, nl[N_MBPOOL].n_value, 383 nl[N_MCLPOOL].n_value); 384 exit(0); 385 } 386 if (Pflag) { 387 if (tp == NULL) { 388 /* Default to TCP. */ 389 tp = name2protox("tcp"); 390 } 391 if (tp->pr_dump) 392 (*tp->pr_dump)(pcbaddr); 393 else 394 printf("%s: no PCB dump routine\n", tp->pr_name); 395 exit(0); 396 } 397 if (pflag) { 398 if (tp->pr_stats) 399 (*tp->pr_stats)(nl[tp->pr_sindex].n_value, 400 tp->pr_name); 401 else 402 printf("%s: no stats routine\n", tp->pr_name); 403 exit(0); 404 } 405 /* 406 * Keep file descriptors open to avoid overhead 407 * of open/close on each call to get* routines. 408 */ 409 sethostent(1); 410 setnetent(1); 411 if (iflag) { 412 intpr(interval, nl[N_IFNET].n_value); 413 exit(0); 414 } 415 if (rflag) { 416 if (sflag) 417 rt_stats(nl[N_RTSTAT].n_value); 418 else 419 routepr(nl[N_RTREE].n_value); 420 exit(0); 421 } 422 #ifndef SMALL 423 if (gflag) { 424 if (sflag) 425 mrt_stats(nl[N_MRTPROTO].n_value, 426 nl[N_MRTSTAT].n_value); 427 else 428 mroutepr(nl[N_MRTPROTO].n_value, 429 nl[N_MFCHASHTBL].n_value, 430 nl[N_MFCHASH].n_value, 431 nl[N_VIFTABLE].n_value); 432 exit(0); 433 } 434 #endif 435 if (af == AF_INET || af == AF_UNSPEC) { 436 setprotoent(1); 437 setservent(1); 438 /* ugh, this is O(MN) ... why do we do this? */ 439 while ((p = getprotoent()) != NULL) { 440 for (tp = protox; tp->pr_name; tp++) 441 if (strcmp(tp->pr_name, p->p_name) == 0) 442 break; 443 if (tp->pr_name == 0 || tp->pr_wanted == 0) 444 continue; 445 printproto(tp, p->p_name); 446 } 447 endprotoent(); 448 } 449 #ifndef SMALL 450 if (af == AF_APPLETALK || af == AF_UNSPEC) 451 for (tp = atalkprotox; tp->pr_name; tp++) 452 printproto(tp, tp->pr_name); 453 if (af == AF_NS || af == AF_UNSPEC) 454 for (tp = nsprotox; tp->pr_name; tp++) 455 printproto(tp, tp->pr_name); 456 if (af == AF_ISO || af == AF_UNSPEC) 457 for (tp = isoprotox; tp->pr_name; tp++) 458 printproto(tp, tp->pr_name); 459 if ((af == AF_LOCAL || af == AF_UNSPEC) && !sflag) 460 unixpr(nl[N_UNIXSW].n_value); 461 #endif 462 exit(0); 463 } 464 465 /* 466 * Print out protocol statistics or control blocks (per sflag). 467 * If the interface was not specifically requested, and the symbol 468 * is not in the namelist, ignore this one. 469 */ 470 static void 471 printproto(tp, name) 472 struct protox *tp; 473 char *name; 474 { 475 void (*pr) __P((u_long, char *)); 476 u_long off; 477 478 if (sflag) { 479 pr = tp->pr_stats; 480 off = nl[tp->pr_sindex].n_value; 481 } else { 482 pr = tp->pr_cblocks; 483 off = nl[tp->pr_index].n_value; 484 } 485 if (pr != NULL && (off || af != AF_UNSPEC)) 486 (*pr)(off, name); 487 } 488 489 /* 490 * Read kernel memory, return 0 on success. 491 */ 492 int 493 kread(addr, buf, size) 494 u_long addr; 495 char *buf; 496 int size; 497 { 498 499 if (kvm_read(kvmd, addr, buf, size) != size) { 500 warnx("%s\n", kvm_geterr(kvmd)); 501 return (-1); 502 } 503 return (0); 504 } 505 506 char * 507 plural(n) 508 int n; 509 { 510 511 return (n != 1 ? "s" : ""); 512 } 513 514 char * 515 plurales(n) 516 int n; 517 { 518 519 return (n != 1 ? "es" : ""); 520 } 521 522 /* 523 * Find the protox for the given "well-known" name. 524 */ 525 static struct protox * 526 knownname(name) 527 char *name; 528 { 529 struct protox **tpp, *tp; 530 531 for (tpp = protoprotox; *tpp; tpp++) 532 for (tp = *tpp; tp->pr_name; tp++) 533 if (strcmp(tp->pr_name, name) == 0) 534 return (tp); 535 return (NULL); 536 } 537 538 /* 539 * Find the protox corresponding to name. 540 */ 541 static struct protox * 542 name2protox(name) 543 char *name; 544 { 545 struct protox *tp; 546 char **alias; /* alias from p->aliases */ 547 struct protoent *p; 548 549 /* 550 * Try to find the name in the list of "well-known" names. If that 551 * fails, check if name is an alias for an Internet protocol. 552 */ 553 if ((tp = knownname(name)) != NULL) 554 return (tp); 555 556 setprotoent(1); /* make protocol lookup cheaper */ 557 while ((p = getprotoent()) != NULL) { 558 /* assert: name not same as p->name */ 559 for (alias = p->p_aliases; *alias; alias++) 560 if (strcmp(name, *alias) == 0) { 561 endprotoent(); 562 return (knownname(p->p_name)); 563 } 564 } 565 endprotoent(); 566 return (NULL); 567 } 568 569 static void 570 usage() 571 { 572 (void)fprintf(stderr, 573 "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", __progname); 574 (void)fprintf(stderr, 575 " %s [-gimnrsv] [-f address_family] [-M core] [-N system]\n", 576 __progname); 577 (void)fprintf(stderr, 578 " %s [-n] [-I interface] [-M core] [-N system] [-w wait]\n", __progname); 579 (void)fprintf(stderr, 580 " %s [-M core] [-N system] [-p protocol]\n", __progname); 581 (void)fprintf(stderr, 582 " %s [-M core] [-N system] [-p protocol] -P pcbaddr\n", __progname); 583 exit(1); 584 } 585
Indexes created Sat Sep 27 22:09:54 GMT 2025